It took me two days to come up with a game plan for that one. I moved everyone back to the other side of the room, where the staircase is. I called up as many summon monsters as I possibly could and had them form a barricade around me. I then separated my physically weak magic users in the back, positioning the healers behind a fighter so that the fighter would protect the healer, and receive healing from behind. My fighters were also separated from each other, so as not to draw too much melee into one spot. Then I walked up with my fastest person,(thief) and made contact with the dwarf I chose to kick it off with. I had a summoned monster by my side to delay him long enough for me to ge very far away. Then, my wizard cast a area affect spell, and by the time the thief got behind the battle lines to begin raining in the arrows, the battle was joined. I kept a close watch on everything, pausing frequently to change a command or weapon. The battle went extremley well, although one of the rascals broke through my barrier when the summon monsters were killed andgot at my thief. She was almost lost, but she held on by a thread.
I know you did not ask about my personal experience, but maybe it will provoke thought on your part. Good luck!
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Larry, ??? of the OHF